A.發(fā)病率6.8% B.罹患率6.8% C.發(fā)病專率6.8% D.患病專率6.8% E.患病率6.8%
A.2 B.5 C.4 D.16 E.無法計算
A.80% B.500% C.200% D.400% E.無法計算